Micro:bit Python Editor

1-1 Show vs Scroll

Show your name first

inc. delay=100 & loop

e.g.("harrison", delay=100, loop=True)

=====

Show the Images

display.show(Image.HEART)

=======

1-2 image

loop ( 迴圈 )

loop參數預設值是 False（假），表示僅執行一次而已；loop = True （真），即可使 scroll 函式反覆執行該動作，而各參數之間須加逗號以示區隔，且注意逗號和指令中間要留一個空白以示區隔，且指令大小寫需依規定，例如 TRUE 或 true 都是不可以的。

show裡面string的參數若是文字，前後要加單引號或雙引號，數字不用加引號。

2. LED control

Light brightness control

實作三:

【內置LED燈如何顯示】

from microbit import *

for x in range(5):

for y in range(5):

display.set_pixel(x, y, 9)

sleep(200)

實作1:

將左列程式改另一種顯示模式

實作2:

如果我們不想要填滿整個LED矩陣，而只想讓LED在畫面上移動？

display.clear()

實作3:

將左列程式改成無限迴圈

(while True:)的顯示

3. Music 播放音樂

import music

music.play("C4:4")

music.play("E4:4")

=========

import music

A = ["C4:4", "E4:4"]

music.play(A)

想一想輸出結果

from microbit import *

while True:

sleep(500)

if button_a.is_pressed():

display.set_pixel(2, 2, 9)

sleep(1000)

else:

display.set_pixel(2, 2, 0)

想一想輸出結果

from microbit import *

from random import randint

while True:

val = 9

x = randint(0, 4)

y = randint(0,4)

display.set_pixel(x, y, val)

while (val > 0):

display.set_pixel(x, y, val)

sleep(500)

val = val-1

display.set_pixel(x, y, 0)

播放歌曲

若要播放音效，需先匯人 music 元件庫，「music.BIRTHDAY」是内建的音效，其名稱均為大寫。

DADADADUM.
ENTERTAINER.
PRELUDE.
ODE.
NYAN.
RINGTONE.
FUNK.
BLUES.

下列程式的輸出結果⋯⋯

from microbit import *

import music

while True:

music.pitch(accelerometer.get_y(), 10)

If else 指令

4. button (按鈕輸入)

下列程式的輸出結果⋯⋯

from microbit import *

while True:

if button_a.was_pressed():

answer = random.randrange(3)

display.show(answer)

is_pressed()在於:除非您在那個精確時刻按下按鈕，否則您將無法檢測該按鈕是否被按下。

下列程式的輸出結果⋯⋯

from microbit import *

import random

while True:

if button_a.was_pressed():

display.show(str(random.randint(1, 6)))

5. count button (計算按鍵次數)

get 代表「得到」presses 代表「按下」意思， get presses 得到的是數值。

若不想捲動顯示結果可將 scroll 改為show，若想反覆執行可以使用while True:

。

6. and (檢查是否同時按下兩鍵)

如果同時按下兩個按鈕則顯示AB，並跳出迴圈。

Random

如果shake，就亂數產生點數。

from microbit import *

import random

while True:

if button_a.was_pressed():

display.scroll(random.randint(1, 30))

sleep(1000)

左列程式的執行結果為何？

from microbit import *

import random

begin = 5

while True:

if button_a.was_pressed():

begin += 1

if begin > 9:

begin = 9

elif button_b.was_pressed():

begin -= 1

if begin < 0:

begin = 0

display.show(begin)

請將左列調音器程式改方向 (按A鍵變小聲，按B鍵變大聲）？

温度感測

看懂程式碼

加速感測器1

加速感測器2

光線偵測光線偵測

觸摸感測

磁力感測

TIP. Loop

指北針

import speech

speech.say("Hello, My name is Harrison")

文字轉語音

Sound meter

from microbit import *

# function to map any range of numbers to another range

def map(value, fromMin, fromMax, toMin, toMax):

fromRange = fromMax - fromMin

toRange = toMax - toMin

valueScaled = float(value - fromMin) / float(fromRange)

return toMin + (valueScaled * toRange)

# set of images for simple bar chart

graph5 = Image("99999:"

"99999:"

"99999")

graph4 = Image("00000:"

"99999:"

"99999")

graph3 = Image("00000:"

"00000:"

"99999:"

"99999")

graph2 = Image("00000:"

"00000:"

"99999:"

"99999")

graph1 = Image("00000:"

"00000:"

"99999")

graph0 = Image("00000:"

"00000:"

"00000")

allGraphs = [graph0, graph1, graph2, graph3, graph4, graph5]

# ignore first sound level reading

soundLevel = microphone.sound_level()

sleep(200)

while True:

# map sound levels from range 0-255 to range 0-5 for choosing graph image

soundLevel = int(map(microphone.sound_level(), 0, 255, 0, 5))

display.show(allGraphs[soundLevel])

WS 2812 循環燈

from microbit import *

import neopixel

# 設置WS2812 LED燈條

np = neopixel.NeoPixel(pin0, 24)

# 紅、綠、藍三種顏色

colors = [ (255, 0, 0), (0, 255, 0), (0, 0, 255) ]

# 循環顯示每種顏色

while True:

for color in colors:

for i in range(len(np)):

np[i] = color

np.show()

sleep(500)

WS 2812 呼吸燈

from microbit import *

import neopixel

# 設置WS2812 LED燈條

np = neopixel.NeoPixel(pin0, 24)

# 最大亮度

MAX_BRIGHTNESS = 50

# 呼吸燈效果

while True:

for i in range(MAX_BRIGHTNESS):

for j in range(len(np)):

np[j] = (i, i, 0)

np.show()

sleep(20)

for i in range(MAX_BRIGHTNESS, 0, -1):

for j in range(len(np)):

np[j] = (i, i, 0)

np.show()

sleep(20)

WS 2812 流水燈

from microbit import *

import neopixel

# 設置WS2812 LED燈條

np = neopixel.NeoPixel(pin0, 24)

# 紅、橙、黃、綠、青、藍、紫七種顏色

colors = [(255, 0, 0), (255, 127, 0), (255, 255, 0),

(0, 255, 0), (0, 255, 255), (0, 0, 255), (127, 0, 255)]

# 彩虹效果

while True:

for i in range(len(colors)):

for j in range(len(np)):

np[j] = colors[(i+j) % len(colors)]

np.show()

sleep(100)

想一想輸出結果

TBA

HC- SR04 感測

from microbit import *

import utime

# Trigger 和 Echo 連接的引腳

TRIG = pin0

ECHO = pin1

def distance_measurement():

TRIG.write_digital(0)

utime.sleep_us(2)

TRIG.write_digital(1)

utime.sleep_us(10)

TRIG.write_digital(0)

while ECHO.read_digital() == 0:

pass

start = utime.ticks_us()

while ECHO.read_digital() == 1:

pass

stop = utime.ticks_us()

distance = (stop - start) / 58

return distance

while True:

dist = distance_measurement()

if dist < 20:

display.show(Image.SAD)

sleep(500)

else:

display.clear()

sleep(100)